Delta ring seal for ball valve seat



FIG. 1 is a top and side perspective view of a delta ring seal for ball valve seat;

FIG. 2 is a side perspective view thereof;

FIG. 3 is a bottom and side perspective view thereof; and,

FIG. 4 is a cross sectional view through line 4-4 of FIG. 2. 

CLAIM The ornamental design for a delta ring seal for ball valve seat, as shown and described. 